James Madison-class submarine

The James Madison class of submarine was an evolutionary development from the Lafayette-class submarine of fleet ballistic missile submarine. They were identical to the Lafayettes except for being initially designed to carry the Polaris A-3 missile instead of the earlier A-2. This class, together with the George Washington-class submarine, Ethan Allen-class submarine, Lafayette-class submarine, and Benjamin Franklin-class submarine classes, composed the "41 for Freedom" that was the Navy's primary contribution to the nuclear deterrent force through the late 1980s. This class and the Benjamin Franklin class are combined with the Lafayettes in some references.

Design
In the early 1970s all were modified for the Poseidon C-3 missile. During the late 1970s and early 1980s, six boats were further modified to carry the Trident I C-4 missile, along with six Benjamin Franklin-class boats. These were James Madison, Daniel Boone, John C. Calhoun, Von Steuben, Casimir Pulaski, and Stonewall Jackson.

Fate
The James Madisons were decommissioned between 1986 and 1995 due to a combination of SALT II treaty limitations as the Ohio-class submarine SSBNs entered service, age, and the collapse of the Soviet Union. One (Sam Rayburn) remains out of commission but converted to a Moored Training Ship (MTS-635) with the missile compartment removed. She is stationed at Norfolk Naval Shipyard in Portsmouth, VA for inactivation.

Boats in class
Submarines of the James Madison class: (Submarines marked with * indicate Trident I C-4 ballistic missile conversions.)